What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)?…

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Chemistry WAEC 1995

What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]

  • 88.9% checkmark
  • 80.0%
  • 66.7%
  • 20.0%
  • 11.1%

The correct answer is: A

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